Work and Energy:
The metric system unit of measure for work or energy is the Joule.
1J = 1 Kg m2/s2 from the units develop an equation for work:
The original metric system measure of energy was the calorie.
1 cal = 4.184 J
Cal vs cal
1
Types of energy;
Mechanical
Electrical
Nuclear
Chemical
Electromagnetic
....
2
Potential and Kinetic energy
PE or U = mgh
KE = 1/2 mv2
h= height
3
4
How fast would the ball be traveling just before it strikes the ground?
h=10.0 m
5
How fast would the ball be traveling 1/2 way through its fall?
h=10.0 m
6
Find the speed of the car at the top of the loop.
25.0 m
15.0 m
7
E=mgh
E=1/2mv2
8
9